An example of NAT is how the Internet reads the information sent from a personal computer.
From Burmese á€”á€á€º (nat).
- (obsolete) Not. [14th-17th c.]
Reduced form of naught.
Abbreviation of natural logarithm.
nat - Computer Definition
A protocol that translates a private Internet Protocol (IP) address used in private domain, such as a LAN, into a public IP address that can be used in a public domain, such as the Internet. The translation process takes place in a router that interfaces to both domains, and operates on a symmetric basis, with translations taking place in both directions for the duration of a public session. NAT software allows the LAN-attached host to protect the privacy of its local identity as it accesses the Internet. NAT is specified in RFC 3022 from the Internet Engineering Task Force (IETF). See also domain, IETF, Internet, LAN, private IP address, protocol, public IP address, router, and symmetric.
(Network Address Translation) The technology that maintains the privacy of the addresses of the computers in a home or business network when accessing the Internet. It converts the private addresses that are assigned to the internal computers to one or more public addresses that are visible on the Internet (see private IP address). NAT is an IETF standard that is implemented in a router or firewall as well as in any user's machine that is configured to share its Internet connection (see ICS). NAT assigns a number to the packet headers of the messages going out to the Internet and keeps track of them via an internal table that it creates. When responses come back from the Internet, NAT uses the table to perform the reverse conversion to the private IP address of the requesting client machine (see illustration below). A First-Level Firewall NAT enhances security by keeping internal addresses hidden from the outside world. It prevents several kinds of first-level attacks, but not all, and must be used in conjunction with the firewall built into the router or the personal firewall in each user's machine. Enterprises generally use very robust firewall architectures for security (see firewall). See dynamic NAT.